4
Part II. System Maintenance
RO-CTOP-C & RO-CTOP-PHC FILTER CHANGE SCHEDULE
FILTER CHANGE INSTRUCTIONS
Stage-1 & Stage-2
Replace every
6-8 months.
(Private well water source: may need to replace pre-filters sooner than
8 months due to heavy sediments and other particles.)
Stage-3 Membrane: City Water:
Replace every
2-3 years
depending on input water
quality, water usage, and pre-filters change maintenance.
Private Well Water:
Replace every
2 years
depending on well water
quality, and pre-filters change maintenance.
Stage-4 Post-Filter: For RO-CTOP-C System:
Replace every
2-3 years.
It’s best to replace
this filter when replacing the stage-4 membrane.
For RO-CTOP-PHC System:
Replace every
6-12 months.
Important!
It is important to change the 2 pre-filters timely, at least every 6-8 months. The pre-filters pro-
tect the stage-3 membrane. If they are not changed timely and become over-depleted, the membrane will
be damaged and the RO system will be contaminated.
It’s best to use APEC replacement filters. Using “non-APEC” and lesser quality filters may clog up the RO
system and damage the membrane.
2. Filter Ports:
All filters have Quick-Connect ports. Remove and connect tubing to filter ports as shown
in the “Quick-Connect Guide” diagram. (See
Figure D1-D3
in the next page).
1. Removing Case:
The system comes with a premium case. The top half of the case will need to be re-
moved to replace the filters inside. To remove the top cover, you will need to remove the
2 bottom screws
ONLY
on each end of the case. Please
DO NOT
remove the top 2 screws (See
Figure C
in the next page).
3. Removing Filters:
Please change
one filter at a time
to avoid mixing up the filters. New filters come
with 2” protective plugs on each end. You can take them out by pressing on the collet ring with one finger
and using a pair of pliers or hand to pull out the protective tubing (See
Figure D1
in the next page).
The system requires very little maintenance. Just change the filter cartridges regularly as suggested below.
Keep the system indoors away from extreme hot or cold temperatures, and run the system within its reason-
able output capacity (i.e. allow the system to rest at least a few hours a day).
Pre-Filters:
